SBC-GX1 Technical Manual Appendix G – Display Converter 1 (DC1)
Hardware Details
CS9211
The DC1 uses a National Semiconductor CS9211. This device interfaces with the
CS5530 TFT display interface on GX1 based processor boards, converting the display
signals so they are compatible with STN and DSTN LCD displays.
The pass through mode for TFT displays is not supported on the DC1, and the number
of display bits is limited to 16. (The CS9211 can support up to 24-bits.)
The CS9211 incorporates frame rate modulation, dithering and control of input and
output sync pulse widths, delays and polarities that allow interfaces to many different
panel types. The frame rate modulation cannot be turned off; it can be modified,
however, through programming registers. For programming details refer to the sample
application supplied with the board and the CS9211 data sheet.
The CS9211 is configured via a four wire serial link. The DC1 uses the SBC-GX1 GPIO
lines to provide this serial connection. The following table shows details of the GPIO
usage on the DC1:
GPIO Configuration Connection Function
GPIO0 OUTPUT CS9211 SCK CS9211 programming interface clock input
GPIO1 OUTPUT CS9211 SDIN CS9211 programming interface data input
GPIO2 OUTPUT CS9211 SCS CS9211 programming interface chip select
GPIO3 INPUT CS9211 SDO CS9211 programming interface data output
GPIO4 OUTPUT Manual Reset MAX811SEUS reset control (Optional)
GPIO5 OUTPUT Contrast UP Optional MAX686 contrast up control
SDRAM
A 16M x 16 bits SDRAM is used as a frame buffer during the DSTN mode of operation.
The display data is placed into this memory and buffered before being output to the
STN display.
© 2004 Arcom Issue D 101
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